let Scope = require('./scope');
var a = 1;//全局变量
function one() {
    var b = 2;
    function three() {
        var c = 3;
        console.log(a, b, c);//先找当前作用域 一层层网上找
    }
    three();
}
one();

let globalScope = new Scope({
    name:'global',
    params:['a'], //全局作用域下变量标识符是a
    parent:null
})